‘NoneType‘ object has no attribute ‘shape‘

【问题描述】

今天在运行github上的tiler项目时，使用自定义的图片和gen_circle_100文件夹运行代码时弹出错误'NoneType' object has no attribute 'shape'。

【问题解决】

Error定位在下面最后一句：

    img = cv2.imread(path, cv2.IMREAD_UNCHANGED)if img.shape[2] == 3:img = cv2.cvtColor(img, cv2.COLOR_BGR2BGRA)

网上此问题的blog都是由于填写文件名错误导致的，与我的情况不同。

刚开始因为pycharm同时在cv2.imread处弹出 '__init__.py' 中找不到引用 'imread'，而且定位到cv2的__init__.py也确实没有找到imread这个方法，让我误以为是我的cv2包导入错误或时cv2版本不兼容。

在多次尝试之后，恢复到初始的代码，重新运行，并在上述代码中间添加了两句输出当前img读取的文件名和类型的语句：

    img = cv2.imread(path, cv2.IMREAD_UNCHANGED)print(type(img))if img.shape[2] == 3:img = cv2.cvtColor(img, cv2.COLOR_BGR2BGRA)

再次运行后结果如下：

Loading tiles0%|                                                                                  | 0/126 [00:00<?, ?it/s]<class 'numpy.ndarray'>
<class 'numpy.ndarray'>
<class 'numpy.ndarray'>
<class 'numpy.ndarray'>
<class 'numpy.ndarray'>4%|██▉                                                                       | 5/126 [00:00<00:02, 47.43it/s]<class 'numpy.ndarray'>
<class 'numpy.ndarray'>
<class 'numpy.ndarray'>
<class 'numpy.ndarray'>
<class 'numpy.ndarray'>
<class 'numpy.ndarray'>
<class 'NoneType'>9%|██████▎                                                                  | 11/126 [00:00<00:02, 55.19it/s]

原来是在最开始读入tiles数据时误读了一个异常的文件引起的，打开文件夹查看了一圈没有发现奇怪的文件，又增加了一句，想看看是哪里来的害虫：

    print(path)img = cv2.imread(path, cv2.IMREAD_UNCHANGED)print(type(img))if img.shape[2] == 3:img = cv2.cvtColor(img, cv2.COLOR_BGR2BGRA)

结果如下：

  0%|                                                                                  | 0/126 [00:00<?, ?it/s]/Users/kunliang/tiler/tiles/circles/gen_circle_100/circle_100_0.2_0.5_0.5_r0.png
<class 'numpy.ndarray'>
/Users/kunliang/tiler/tiles/circles/gen_circle_100/circle_100_0.5_0.8_0.5_r0.png
<class 'numpy.ndarray'>
/Users/kunliang/tiler/tiles/circles/gen_circle_100/circle_100_0.8_0.2_0.5_r0.png
<class 'numpy.ndarray'>
/Users/kunliang/tiler/tiles/circles/gen_circle_100/circle_100_0.0_0.2_0.5_r0.png
<class 'numpy.ndarray'>
/Users/kunliang/tiler/tiles/circles/gen_circle_100/circle_100_0.5_1.0_0.5_r0.png
<class 'numpy.ndarray'>
/Users/kunliang/tiler/tiles/circles/gen_circle_100/circle_100_1.0_0.0_0.5_r0.png
<class 'numpy.ndarray'>
/Users/kunliang/tiler/tiles/circles/gen_circle_100/circle_100_0.5_0.5_0.5_r0.png
<class 'numpy.ndarray'>6%|████                                                                      | 7/126 [00:00<00:01, 61.01it/s]/Users/kunliang/tiler/tiles/circles/gen_circle_100/circle_100_0.2_0.8_0.5_r0.png
<class 'numpy.ndarray'>
/Users/kunliang/tiler/tiles/circles/gen_circle_100/circle_100_0.2_1.0_0.5_r0.png
<class 'numpy.ndarray'>
/Users/kunliang/tiler/tiles/circles/gen_circle_100/circle_100_1.0_1.0_0.5_r0.png
<class 'numpy.ndarray'>
/Users/kunliang/tiler/tiles/circles/gen_circle_100/circle_100_0.5_0.0_0.5_r0.png
<class 'numpy.ndarray'>
/Users/kunliang/tiler/tiles/circles/gen_circle_100/.DS_Store
<class 'NoneType'>

原来是mac自动生成的.DS_Store文件。于是改变了运行的文件夹，使用gen_circle_200时成功运行。

原来是因为在Finder中打开文件夹后就会自动生成.DS_Store文件，且不能设置不让mac自动生成.DS_Store文件。

于是在bash中cd定位到gen_circle_100文件夹，输入ls -la查看果然有这个害虫，输入rm .DS_Store，在此查看ls -la已经删除了,然后再次运行我的程序，终于可以正常输出了。

猛男落泪，嘤嘤嘤~

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